Well aside from the obvious point of having to pay money for one and not for the other, what are the differences in the two? Namely, what are the compatibility problems between them, and are there ways to bypass it?

the main script. thats the problem. maybe its the whole load of scripts but ive noticed the main script in the legal version is different to the illegal one. maybe if you messed with it alot you could make it work

note: you'd probably have to be better at ruby than the guys who made it up to do this

Go into the document of which the downloaded rmxp game is in. then, copy: Audio, Graphics and Data. now, make a new game using the postality knights editon (or PKE) and go into that games document. now, paste all those files (Audio, Graphics and Data) and say "Yes to All". now open the PKE game and there you go

Hey, that's pretty nifty. Thanks I'll probably end up making two copies of my first game when I finish it then. One for purchasers, which is what I am working on, then make it for everyone else. I'd like to hear some constructive criticism, so I'll make sure everyone can play it.